il file di configurazione della compilazione prevede queste righe per GRASS:

GRASS_INCLUDE_DIR GRASS_INCLUDE_DIR-NOTFOUND
GRASS_INCLUDE_DIR7 /usr/lib/grass70/include
GRASS_PREFIX
GRASS_PREFIX7 /usr/lib/grass70/lib

WITH_GRASS OFF
WITH_GRASS7 ON

nessun errore al controllo configurazione:

cmake .
-- QGIS version: 2.13.0 Master (21300)
-- Could not find GRASS 6
-- Found GRASS 7: /usr/lib/grass70 (7.0.1, off_t size = )
-- Found Proj: /usr/lib/x86_64-linux-gnu/libproj.so
-- Found GEOS: /usr/lib/x86_64-linux-gnu/libgeos_c.so (3.5.0)
-- Found GDAL: /usr/lib/libgdal.so (1.11.2)
-- Found Expat: /usr/lib/x86_64-linux-gnu/libexpat.so
-- Found Spatialindex: /usr/lib/x86_64-linux-gnu/libspatialindex.so
-- Found Qwt: /usr/lib/libqwt.so (6.1.2)
-- Found Sqlite3: /usr/lib/x86_64-linux-gnu/libsqlite3.so
-- Found PostgreSQL: /usr/lib/x86_64-linux-gnu/libpq.so
-- Found SpatiaLite: /usr/lib/x86_64-linux-gnu/libspatialite.so
-- Found Qt version: 4.8.6
-- Touch support disabled
-- Found QScintilla2: /usr/lib/libqscintilla2.so (2.9)
-- Found QCA: /usr/lib/x86_64-linux-gnu/libqca.so (2.1.0)
-- Found QCA OpenSSL plugin
-- Pedantic compiler settings enabled
-- Found Python executable: /usr/bin/python
-- Found Python version: 2.7.10
-- Found Python library: /usr/lib/x86_64-linux-gnu/libpython2.7.so
-- Found SIP version: 4.16.9
-- Found PyQt4 version: 4.11.4
-- Found QScintilla2 PyQt4 module: 2.9
-- Found GSL: -L/usr/lib/x86_64-linux-gnu -lgsl -lgslcblas -lm
-- Qsci sip file not found - disabling bindings for derived classes
-- Ctest Binary Directory  set to: /home/eugenio/dev/cpp/QGIS/build_master/output/bin
-- Configuring done
-- Generating done
-- Build files have been written to: /home/eugenio/dev/cpp/QGIS/build_master